Effect of correlation on nearly flat bands in twisted bilayer graphene
ORAL
Abstract
Recently, correlated insulating phases were observed experimentally in twisted bilayer graphene (TBG) at different doping concentrations. To study possible mechanisms for insulating phases, we investigate electronic and magnetic properties in TBG by performing dynamical mean-field theory calculations based on a minimal tight-binding Hamiltonian. We study variation in the spectral function of the nearly flat bands for a range of local interaction parameters, electron filling, and temperature. We compare our results with experimental reports and discuss the possibility of Mott insulating phase in this system.
–
Presenters
-
Mancheon Han
Department of Physics, Yonsei University, Seoul 03722, Korea
Authors
-
Mancheon Han
Department of Physics, Yonsei University, Seoul 03722, Korea
-
Young Woo Choi
Department of Physics, Yonsei University, Seoul 03722, Korea, Department of Physics, Yonsei University, Seoul, 03722, Korea, Institute of Physics and Applied Physics, Yonsei University
-
Hyoung Joon Choi
Department of Physics, Yonsei University, Seoul 03722, Korea, Department of Physics, Yonsei University, Seoul, 03722, Korea, Institute of Physics and Applied Physics, Yonsei University